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Product Description

QL-1000 is a food-grade laccase produced from strains of Aspergillus oryzae through submerged fermentation, extraction and refinery processes. It is a glycoprotein consisting of three parts: peptide chain, glycoside and copper ions Cu2+. Laccase can catalyze phenols, aromatic amines, carboxylic acids, steroid hormones, biological pigments, metal organic compounds and non-phenolic substances to produce quinone compounds, carbonyl compounds and water. The copper ions contained in laccase, which are located at the active site of the enzyme, can cooperatively transfer electrons and reduce oxygen to water during oxidation reactions.
This product is suitable for various applications in food industry, including beer, wine, juice, baking, alcohol and brewing, etc.
Product Characteristics
Declared Enzyme:       Laccase
EC Number:
Appearance: Light yellow powder
Activity: 10,000 U/g (minimum)
Moisture: 8% (Maximum)
Effect of Temperature
QL-1000 can work at temperatures from 30 to 70℃, with its optimal temperature range from 45 to 65℃(see Figure 1).
Effect of pH
QL-1000 can work at pH from 3.0 to 5.5, with its optimal pH range from 3.5 to 5.0 (see Figure 2).
Beer :
QL-1000 can be used in the pre-treatment of wort or at the end of the beer production process to remove oxygen and oxidize the unwanted phenolic compounds, thus increase the transparency of beer, improve the quality and nutritional value, and extend the shelf-life.
Wine :
QL-1000 can be used in the wine production to improve the stability of wine. A major factor that determines the quality of wine is its stability. Only stable wine can maintain its mellow taste. QL-1000 can help to oxidize the residual phenolic compounds in the wine, thus greatly improve the stability of wine, retain the taste and nutrients.
QL-1000 can also be used as clarifying agent during the wine processing in the order of laccase + silica solution or laccase + polyvinylpyrrolidone (addition of sulfur dioxide), which is better and more effective than the conventional clarifying method (caseinic acid + activated carbon + bentonite ).
Juice :
Phenols and their oxides naturally present in juice will affect the unique flavor and color of juice, so phenols are extremely important index for juice beverages. Comparing with the conventional method of adding ascorbic acid and sulfate, use of laccase in the filtration of juice processing can greatly improve the flavor and color of juice, and improve its stability.
Laccase has the special ability of cross-linking polymers. Use of QL-1000 in baking can increase the dough strength and reduce the viscosity of dough, improve the processing properties of dough
and inhibit the expansion of flour during the baking process, and make a denser taste. In addition, QL-1000 can improve the structure of dough and increase the softness of baked products.
Other application:
  • In the production of edible fungus, QL-1000 can promote the decomposition of lignin and provide more easily absorbed nutrients for fungus cultivation.
  • The catalytic properties of copper ions in laccase enables QL-1000 to remove dissolved oxygen in food, such as salads and mayonnaise, and eliminate volatile odor components generated by the reaction of linolenic acid and dissolved oxygen contained in food, so as to improve the sensory characteristics.
  • In the production of alcohol and brewing can improve the extraction rate of grain cell content (such as protein, starch and some trace elements), shorten fermentation time, and increase the yield of alcohol.
Packaging, Storage & Shelf-life
  • QL-1000 is packaged in 20kg cardboard drums or kraft paper bags.
  • This product should be stored below 25°C in its original packaging, sealed and unopened, protected from direct sunlight.Typical shelf-life is twelve months.
  • Prolonged storage and/or adverse conditions such as higher temperatures may lead to a higher dosage requirement, and therefore should be avoided.
Safe Handling of Enzymes
Inhalation of enzyme dust and mists should be avoided. In case of contact with skin or eyes, promptly rinse with water for at least 15 minutes. For detailed handling information, please refer to the Safety Data Sheet.

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